Find flights
When to book
FAQs

Cheap flights from Idaho to London from £202

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 18 September 2025.

Round-trip from

£443

One-way from

£202

Popular in

June

Cheapest in

October

Average price

£583
Scandinavian Airlines
  • Scandinavian Airlines
  • 28/10-12/11
  • 4 total stops
  • 46h 54m total
  • Idaho to London
Search Deals
26/10
  • 26/10
  • 2 total stops
  • 35h 32m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£149 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Idaho to London

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Tue 28/1016:00BOI - LHR
2 stops23h 40mScandinavian Airlines
Wed 12/1106:40LHR - BOI
2 stops23h 14mScandinavian Airlines
Deal found 17/9£443
Tue 23/917:39BOI - LHR
1 stop11h 41mUnited Airlines
Wed 1/1014:05LHR - BOI
2 stops28h 34mUnited Airlines
Deal found 16/9£445
Mon 20/1014:39BOI - LHR
1 stop14h 41mUnited Airlines
Fri 31/1013:25LHR - BOI
2 stops28h 14mUnited Airlines
Deal found 17/9£446
Tue 23/905:00BOI - LHR
2 stops20h 35mAir Canada
Wed 1/1014:05LHR - BOI
2 stops35h 42mAir Canada
Deal found 16/9£451
Wed 12/1115:54BOI - LHR
2 stops19h 36mScandinavian Airlines
Mon 17/1119:30LHR - BOI
2 stops34h 24mScandinavian Airlines
Deal found 17/9£452
Sun 5/1009:45BOI - LHR
2 stops19h 05mAir Canada
Tue 14/1015:50LHR - BOI
2 stops32h 08mAir Canada
Deal found 17/9£456
Wed 19/1106:20BOI - LHR
2 stops22h 30mAir Canada
Wed 26/1114:30LHR - BOI
2 stops30h 14mAir Canada
Deal found 17/9£456
Wed 5/1113:10GEG - LHR
1 stop12h 50mDelta
Wed 19/1106:20LHR - GEG
2 stops20h 38mDelta
Deal found 17/9£456
Wed 8/1011:41BOI - LHR
1 stop19h 34mDelta
Wed 15/1006:15LHR - BOI
2 stops16h 51mDelta
Deal found 17/9£457
Wed 1/1011:29GEG - LHR
1 stop18h 46mDelta
Tue 7/1009:00LHR - GEG
2 stops20h 05mDelta
Deal found 17/9£457
Wed 1/1014:05BOI - LHR
1 stop17h 10mDelta
Tue 7/1006:30LHR - BOI
2 stops20h 46mDelta
Deal found 16/9£458
Tue 14/1011:20GEG - LHR
1 stop18h 55mDelta
Tue 21/1006:30LHR - GEG
2 stops16h 27mDelta
Deal found 16/9£458

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 28/10

16:00-21:40

2 stops23h 40m

London Heathrow

Wed 12/11

06:40-22:54

2 stops23h 14m

£443

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

14:43-09:40

1 stop11h 57m

London Heathrow

Thu 26/2

06:35-23:05

2 stops23h 30m

£452

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 8/10

07:45-11:50

2 stops21h 05m

London Heathrow

Tue 14/10

15:50-16:58

2 stops32h 08m

£456

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

09:13-10:30

1 stop17h 17m

London Heathrow

Wed 3/12

06:20-18:56

2 stops20h 36m

£456

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 3/11

05:52-06:50

1 stop16h 58m

London Heathrow

Wed 19/11

17:00-12:32

2 stops27h 32m

£457

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 1/10

06:45-10:00

1 stop19h 15m

London Heathrow

Wed 8/10

11:30-21:05

2 stops17h 35m

£457

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 12/11

14:31-09:40

1 stop12h 09m

London Heathrow

Mon 17/11

16:40-19:45

2 stops34h 05m

£459

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 5/11

07:15-08:45

2 stops17h 30m

London Heathrow

Wed 19/11

06:20-18:58

2 stops20h 38m

£460

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 1/10

13:00-09:50

1 stop13h 50m

London Heathrow

Tue 7/10

17:25-00:08

1 stop13h 43m

£462

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 5/11

05:45-07:05

1 stop17h 20m

London Heathrow

Wed 19/11

10:45-18:33

1 stop15h 48m

£462

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to LON?

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to London as you normally would.

How much does it cost for a return flight from Idaho to London?

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho to London?

    A quick flight from Idaho to London can take about 11h 57m. Scandinavian Airlines provides one of the quickest options available for as low as £452. The distance from Idaho to London is about 4829 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Idaho to London one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as £288. However, be on the lookout for offers from Delta and Iberia, as they are both options that can get you from Idaho to London for a low price.

  • What are the most popular routes from Idaho to London?

    While some choose either Boise Air Term. Gowen Fld - London Heathrow or Spokane - London Gatwick, Spokane - London Heathrow is the most popular route from Idaho to London.

  • Can I find deals for flights from Idaho to London that include hotel bookings?

    Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

  • Can I find deals for business class flights from Idaho to London?

    Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to London?

    Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Hounslow
Slough
Gatwick
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Winchester
Chichester
Ipswich
Dartford
Guildford
Brentford
Bishop's Stortford
Romford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to London

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
Boston to Heathrow flights
Dulles Intl to Heathrow flights
Los Angeles to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to London City flights
LaGuardia to Heathrow flights
John F Kennedy Intl to Gatwick flights
Dallas/Fort Worth to Heathrow flights
San Francisco to Heathrow flights
O'Hare Intl to Heathrow flights
Baltimore to Heathrow flights
Newark to London City flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Stansted flights
Seattle to Heathrow flights
Hobby to Heathrow flights
Miami to Heathrow flights
Boston to London City flights
Boston to Gatwick flights
Newark to Stansted flights
Atlanta to Heathrow flights
Newark to Luton flights
Dulles Intl to Gatwick flights
Philadelphia to Heathrow flights
Reagan-National to Heathrow flights
Denver to Heathrow flights
Dulles Intl to London City flights
Orlando to Heathrow flights
Baltimore to Gatwick flights
George Bush Intcntl to Heathrow flights
Reagan-National to Gatwick flights
Los Angeles to London City flights
Dallas/Fort Worth to Gatwick flights
Boston to Stansted flights
Newark to Edinburgh flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Los Angeles to Gatwick flights
Boston to Luton flights
O'Hare Intl to London City flights
Minneapolis to Heathrow flights
San Francisco to London City flights
Raleigh to Heathrow flights
John F Kennedy Intl to Edinburgh flights
Dulles Intl to Luton flights

Top airline flying from Idaho to London

Discover the top airline that operate flights from Idaho to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£472Average£901FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Idaho to London?

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Idaho to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Idaho to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Idaho to London become cheaper?

Of course! You can now track prices for flights from Idaho to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.